[jira] [Created] (SHIRO-566) CollectionUtils should use Collections wrappers of arrays if possible

["Matt Bishop (JIRA)" <ji...@apache.org>]

Matt Bishop created SHIRO-566:
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             Summary: CollectionUtils should use Collections wrappers of arrays if possible
                 Key: SHIRO-566
                 URL: https://issues.apache.org/jira/browse/SHIRO-566
             Project: Shiro
          Issue Type: Improvement
          Components: Authorization (access control) 
    Affects Versions: 1.2.4
         Environment: Any
            Reporter: Matt Bishop
            Priority: Trivial


org.apache.shiro.util.CollectionUtils.asSet() and .asList() could use Collections wrappers for the passed-in elements. These are smaller and faster than copying the contents into other collections.

The editability of the returned Collections is not required as currently it will return either an unmodifiable emptyList() / emptySet() or a modifiable ArrayList / LinkedHashSet. Ideally it would wrap the LinkedHashSet in unmodifiableSet and declare the immutability of the returned collections in the docs.



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